You mind your own business when it's none of your business. Skaters progress at their own rate; skaters and parents have different goals; people with learning and physical differences do NOT want people poking into their business with comments like, "oh, she can't do [insert here] yet?" or, "you know, if you just took her to [insert doctor, physio, coach here] she would do so much better." Unless you have a close personal relationship, and even then recognizing that many people are very private in terms of these things, stay out of personal territory. My older DD has had to hold her head high on many occasions when snotty brats [sorry, venting] and/or their parents make caustic comments about her inability to do certain things on the ice; she doesn't wear a sign around her neck that says SORRY I BROKE MY LEG REALLY BADLY AS A KID AND SO I CAN'T USE IT PROPERLY - and she doesnt want any pity. Note that she is also a Gold level (top level) skater in Canada, an evaluator, and a judge ... just not Gold in freeskate, yet, and maybe never, because that darned leg just won't do some things that she would really like it to do! You know the comments ... "I got my double in 3 months - how long have YOU been working on it? REALLY?" or "wow, I can't believe you took THAT long to do ", or, "but, everybody can do [insert here]."
Basically, if we want your advice, we'll ask for it. If, however, you see a coach or someone else doing something illegal, then come forward to the appropriate authorities - whether it be sexual, drug related, abusive, etc. Don't gossip behind the coaches' back, and don't drop snide comments about the coach ... if you think something is seriously wrong, be prepared to stand up and come forward about it.
And, as a Special Education teacher: most of my beloved kids want to fit in. They don't want your pity, or to be labelled, or criticized, or pointed at, or presented with "miracle cures" or "stories about their cousins' child who did [insert here] and everything was great" - particularly from people outside of their own circle. They want to do stuff without being made to feel uncomfortable or "failures", and they also don't want to be patronized or smarmed over. They're not freaks - they're people who are struggling with challelenges many of us can never comprehend, and God Bless those who let them succeed in their own way!
[as usual, putting soapbox back under the sink where it lives]